Speed reducer



FIG. 1 is a front view of a first embodiment of a speed reducer of the present invention.

FIG. 2 is a rear view of the speed reducer of FIG. 1.

FIG. 3 is a top plan view of the speed reducer of FIG. 1.

FIG. 4 is a bottom plan view of the speed reducer of FIG. 1.

FIG. 5 is a right side view of the speed reducer of FIG. 1.

FIG. 6 is a left side view of the speed reducer of FIG. 1.

FIG. 7 is a front, top plan and right side perspective view of the speed reducer of FIG. 1; and,

FIG. 8 is a rear, bottom plan and left side perspective view of the speed reducer of FIG. 1.

The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a speed reducer, as shown and described. 